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Fig. 4 —55-year-old man with cirrhosis, ascites, and elevated
bilirubin level. Coronal T2-weighted single-shot fast spin-echo image through
mid abdomen at 3 T with dielectric pad. Despite signal loss over center of
liver secondary to dielectric effect, common duct (arrow) is clearly
seen to ampulla. Duct is normal caliber. No obstructing mass or stone is
present. This patient did not have biliary obstruction as a cause of increased
bilirubin. In some patients, diagnosis is still made despite dielectric
artifact. This patient should have been scanned on 1.5-T scanner.